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Europium Oxide-Hematite Magnetic Ceramic Nanoparticles

Published online by Cambridge University Press:  21 December 2015

Monica Sorescu*
Affiliation:
Duquesne University, Department of Physics, Fisher Hall, Pittsburgh, PA 15282, USA
Lucian Diamandescu
Affiliation:
National Institute of Materials Physics, P.O. Box MG-7, 077125 Bucharest-Magurele, Romania
John DiGnazio
Affiliation:
Duquesne University, Department of Physics, Fisher Hall, Pittsburgh, PA 15282, USA
Tianhong Xu
Affiliation:
Duquesne University, Department of Physics, Fisher Hall, Pittsburgh, PA 15282, USA FlexEl, LLC, 387 Technology Drive, College Park, MD 20742, USA
*
*(Email: sorescu@duq.edu)
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Abstract

Nanoparticle system with the composition xEu2O3-(1-x)α-Fe2O3 (x = 0.1 and 0.5) was successfully synthesized by mechanochemical activation of Eu2O3 and α-Fe2O3 mixtures for 0-12 hours of ball milling time. The study is of relevance to catalysis, biomedical, sensing and energy-related applications. 57Fe and 151Eu Mössbauer spectroscopy were used to investigate the phase evolution, solid solution formation and hyperfine parameters of xEu2O3-(1-x)α-Fe2O3 nanoparticle system under the mechanochemical activation process. The 57Fe Mössbauer studies showed that the spectrum of the ball milled samples evolved from a sextet for hematite to sextets and a doublet upon duration of the milling process with europium oxide. This indicated the formation of the EuFeO3 perovskite for large x values and long milling times. The 151Eu Mössbauer investigations showed that the isomer shift decreased with increasing milling time for all molar concentrations employed.

Type
Articles
Copyright
Copyright © Materials Research Society 2015 

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References

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